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   源码介绍

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package com.example.upanddown;

import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;

import java.io.File;

import com.example.download.DownloadActivity;
import com.example.tool.Tools;
import com.example.upload.ExDialog;
import com.example.util.FileUtil;
import com.example.util.ProtocolBase;
import com.example.util.UploadUtil;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {
	private static String requestURL = ProtocolBase.URL_UPLOAD;
	private String picPath = null;
	
	
	private Context mContext;
	
	private Button upFile;
	private TextView selFile;
	private Button down;
	
	
	private RelativeLayout switchAvatar;
	private ImageView faceImage;

	private String[] items = new String[] { "选择本地图片", "拍照"};
	/* 头像名称 */
	private static final String IMAGE_FILE_NAME = "faceImage.jpg";

	/* 请求码 */
	private static final int IMAGE_REQUEST_CODE = 0;
	private static final int CAMERA_REQUEST_CODE = 1;
	private static final int RESULT_REQUEST_CODE = 2;
	private static final int UPFILE_REQUEST_CODE=3;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE); // 去掉标题
		setContentView(R.layout.activity_main);
		switchAvatar = (RelativeLayout) findViewById(R.id.switch_face_rl);
		faceImage = (ImageView) findViewById(R.id.face);
		upFile = (Button)findViewById(R.id.upfile_btn);
		selFile = (TextView)findViewById(R.id.sel_file_name_tv);
		down = (Button)findViewById(R.id.download_btn);
		// 设置事件监听
		switchAvatar.setOnClickListener(this);
		mContext=MainActivity.this;
		upFile.setOnClickListener(this);
		down.setOnClickListener(this);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	

	/**
	 * 显示选择对话框
	 */
	private void showDialog() {

		new AlertDialog.Builder(this)
				.setTitle("设置头像")
				.setItems(items, new DialogInterface.OnClickListener() {

					@SuppressLint("SdCardPath")
					@Override
					public void onClick(DialogInterface dialog, int which) {
						switch (which) {
						case 0:
							Intent intentFromGallery = new Intent();
							intentFromGallery.setType("image/*"); // 设置文件类型
							intentFromGallery
									.setAction(Intent.ACTION_GET_CONTENT);
							startActivityForResult(intentFromGallery,
									IMAGE_REQUEST_CODE);
							break;
						case 1:

							Intent intentFromCapture = new Intent(
									MediaStore.ACTION_IMAGE_CAPTURE);
							// 判断存储卡是否可以用，可用进行存储
							if (Tools.hasSdcard()) {
								File tempFile = new File("/sdcard/myImage/");
								tempFile.mkdirs();

								intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT,
										Uri.fromFile(new File("/sdcard/myImage/", IMAGE_FILE_NAME)));
							}

							startActivityForResult(intentFromCapture,
									CAMERA_REQUEST_CODE);
							break;
						}
					}
				})
				.setNegativeButton("取消", new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
					}
				}).show();

	}
	
	
	@SuppressLint("SdCardPath")
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		//结果码不等于取消时候
		if (resultCode != RESULT_CANCELED) {

			switch (requestCode) {
			case IMAGE_REQUEST_CODE:
				startPhotoZoom(data.getData());
				break;
			case CAMERA_REQUEST_CODE:
				if (Tools.hasSdcard()) {
					
					File tempFile = new File("/sdcard/myImage/"   IMAGE_FILE_NAME);
					
					startPhotoZoom(Uri.fromFile(tempFile));//上传
					
				} else {
					Toast.makeText(MainActivity.this,"未找到存储卡，无法存储照片！",
							Toast.LENGTH_LONG).show();
				}

				break;
			case RESULT_REQUEST_CODE:
				if (data != null) {
					String p=data.getStringExtra("imagePath");
					getImageToView(data);
				}
				break;
			case UPFILE_REQUEST_CODE://上传文件
				Uri uri=data.getData();//选择的文件uri
//				空格
				File file=new File(uri.toString());
				String fileName=file.getName();
				selFile.setText(fileName);
				UploadUtil.uploadFile(file, requestURL);
				
				
				break;
			}
		}
		super.onActivityResult(requestCode, resultCode, data);
	}
	
	/**
	 * 裁剪
	 * 
	 * @param uri
	 */
	public void startPhotoZoom(Uri uri) {
		Log.i("test", "裁剪的图片：" uri);
		
		

		Intent intent = new Intent("com.android.camera.action.CROP");
		
		
		
		intent.setDataAndType(uri, "image/*");
		// 设置裁剪
		intent.putExtra("crop", "true");
		// aspectX aspectY 是宽高的比例
		intent.putExtra("aspectX", 1);
		intent.putExtra("aspectY", 1);
		// outputX outputY 是裁剪图片宽高
		intent.putExtra("outputX", 320);
		intent.putExtra("outputY", 320);
		intent.putExtra("return-data", true);
		
		
		startActivityForResult(intent, 2);
		
	}

	/**
	 * 保存裁剪之后的图片数据
	 * 
	 * @param picdata
	 */
	private void getImageToView(Intent data) {
		Bundle extras = data.getExtras();
		Log.i("test", "裁剪之后的图片:" picPath);
		if (extras != null) {
			Bitmap photo = extras.getParcelable("data");
			@SuppressWarnings("deprecation")
			Drawable drawable = new BitmapDrawable(photo);
			
			
			
			picPath=  FileUtil.saveFile(mContext, "cut.jpg", photo);
			
			
			faceImage.setImageDrawable(drawable);
			// 上传到服务器
			// 新线程后台上传服务端
			new Thread(uploadImageRunnable).start();
		}
	}
	Runnable uploadImageRunnable = new Runnable() {

		@SuppressLint("ShowToast")
		@Override
		public void run() {
			if (picPath == null) {

				Toast.makeText(MainActivity.this, "图片为空", 1000).show();

			} else {
				final File file = new File(picPath);
				Log.i("test", "上传的path:" picPath);
				if (file != null) {
					//上传
					UploadUtil.uploadFile(file, requestURL);
					Log.i("test", "ok");
				}
			}
		}
		
		
	};

	@SuppressLint("SdCardPath")
	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.switch_face_rl:
			showDialog();//设置头像
			break;
		case R.id.upfile_btn://上传文件
			//自己写的资源管理器
			Intent intent = new Intent();
			intent.putExtra("explorer_title",
					getString(R.string.dialog_read_from_dir));
			intent.setDataAndType(Uri.fromFile(new File("/sdcard")), "*/*");
			intent.setClass(MainActivity.this,ExDialog.class );
			startActivityForResult(intent, UPFILE_REQUEST_CODE);
			
			break;
		case R.id.download_btn://跳转到下载的界面
			Intent it=new Intent();
			it.setClass(MainActivity.this, DownloadActivity.class);
			startActivity(it);
			break;
		default:
			break;
		}
		
	}

}